Spectroscopic Manifestation of Dye Pair Interactions at High Concentrations in structurally organized SiO2 Films

Details Spectroscopic Manifestation of Dye Pair Interactions at High Concentrations in structurally organized SiO2 Films Spectroscopic Manifestation of Dye Pair Interactions at High Concentrations in structurally organized SiO2 Films

2010-07-13

arxiv.org/abs/1007.2042v1

Physics

Optics

12 pages, 7 figures, to be published in LCMC

Scientific paper

Concentration spectral manifestation of the ionic and neutral dyes encapsulated in mesoporous silicate films was studied. The mesoporous dyed SiO2 film was prepared by sol-gel technology with use as surfactant the amphiphilic three-bloc copolymer Pluronic P123. It was discovered when dye concentration exceeds mesoporous one the new spectral bands appear that are distinct from the initial monomolecular predecessors. To explain the phenomena guess is formulated and proved that origin of new spectrums is obliged to formation of the ionic pairs, excimers and excitons with participation of dye molecules localized in the characteristic places of mesoporous silicate film. Key terms: mesoporous silicate film, polymer micelles, dye fluorescence, excimers, ionic pair

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